/Engine/Source/Developer/MessageLog/Public/MessageLogModule.h
EndIModuleInterfaceinterface Registers a log listing with the message log widget. This log is displayed in the global Message Log window by default, but this can be disabled in InitializationOptions. It is not necessary to call this function before outputting to a log via AddMessage etc. This call simply registers a UI to view the log data.
virtual void RegisterLogListing ( const [FName](API\Runtime\Core\UObject\FName) & LogName, const [FText](API\Runtime\Core\Internationalization\FText) & LogLabel, const [FMessageLogInitializationOptions](API\Developer\MessageLog\FMessageLogInitializationOptions) & InitializationOptions )